Pulverizing mill



`lune 3, 1930. Q GALANl v 1,762,056.

PULVERIZ ING MILL Filed Aug. 27, 1927 3 Sheets-Sheet 2 June 3, 1930. G.GALAN PULVERIZYING MILL Filed Aug. 27, 1927 :s sheets-sheet 5 l Ill'. Il

L v/.ye 6.@ www WITNESS Patented June 3, 1930 GEORGE GALAN, lorPITTSBURGH, PENNSYLVANIA PULvEmzING MILL' Application led August 27,1927. Serial 110,215,858.

This invention relates to certain novel improvements in pulverizingmills and is particularly though not necessarily adapted to Such millswherein coal is reduced to powdered form in order that it may be burnedin suitably constructed burners.

The salient object of my invention is to provide a pulverizing millwhich will embody a feed arrangement such that the mill may be kept incontinuous operation.

An object, ancillary to the foregoing, is to provide twoor more feedmechanisms adapted to be arranged so that as one feed mechanism isrendered inoperative by jamming another feed mechanism will be throwninto operation.

Another object of the invention'is to pro vide a pulverizin g millwherein a novel beater arrangement is provided for y reducmg the 0 fuelto powdered form, this beater mechanism being so arranged that acomplete pulveriza tion of the fuel will take place.

A further object of the invention is to provide a pulverizing mill inwhich the operatingA parts will be so positioned that they may beexpeditiously repaired .individually without altering the remainingparts.

A still further obj ect of the invention 1s to provide a pulverizingmill which will he simple in construction and which will be economicalto manufacture.

Other objects will appear hereinafter. The invention consists in thenovel combination and arrangement of parts to be hereinafter describedand claimed.

The invention will be best understood by reference to the accompanyingdrawings, showing the preferred form of construction and in which Fig. 1is a front elevational View of the device, certain parts having beenbroken away;

Fig. 2 is a longitudinal sectional view ot' my improved pulverizingmill;

3 is a view partly in elevation and partly in section of the devicelooking in the opposite direction of Fig. 1;

4 is a detail view of the beater or pulverizing mechanism; and

Fig. 5 is a detail view dipicting an adjustable regulating memberemployed in the-dev1ce.

Referring to the drawings, it may be seen that my improved mechanism ismounted on a base 10 and embodies a housing having end walls 11 and 12.The brackets 13 and'14 are supported from the base 10 and are secured.

to the end walls 11 and 12 respectively. Bearilgs' -15 and 16 arecarriedby the brackets 13 an 14 and are adapted to be aligned. Suitableopenings 17 and 18 are provided in the end walls 11 and 12 respectivelyand a drive shaft 19 extends through these openings and is journaled inthe bearings 15 and 16. Power is adapted to be supplied to the shaft 19at the end 20 thereof, a suitable connection being provided atthispoint. The

mill may be either driven by a direct connection to the power supplyingmechanism or it may be connected thereto through a gear train or otheranalogous means.

On'the drive shaft 19 at the opposite end from the end 20 thereof,ayworm gear 21 is provided. `Adapted to mesh with the worm gear 21 is aworm wheel 22 that is suitably keyed to the shaft 23. The brackets 24and 25 are carried by the bracket 13 and have bearings such as 26therein in which the shaft 23 is ada ted to be journaled. A suitablehousing 2 is provided around the just described mechanism and has aremovable cover 28 so as to afford access to the interior of the housing27.

An opening 29 is .provided in the end wall 11 and a housing 30 isdisposed so as to be in communication with the beater mechanisms throughthe opening 29. The housing 30 is secured to the end wall 11 and deinesa cham ber 32 in which the feed mechanisms are adapted to be mounted.Disposed on the upper side of the chamber 32 is a hopper 33 andcontrolling communication between said hopper 33 and said chamber 32 isa slide door 34. Suitable bearings are provided in the walls of thehousing 30 and j ournaled in these bearings is a shaft 35 on which afeed roller 36 is adapted to be keyed. The feed roller 36 embodies aplurality of openings such as 37 which are waved or contorted in form asis best.shown in Fig. 1. The coal or similar a predetermined sizeintended to to the hopper 33 and discharge opening 29 is, best shown inFig. 2. An adjustable bailie plate 38 is located so as to direct thefuel from the hopper 33 into the openings 37 in the feed roller 36. Abaille member 39 is dis osed on the opposite side of the feed roller 36om the bailie plate 38 so as to insure proper direction of the incomingfuel and to limit the size of the fuel which may pass thereby. Anotherbaille plate 40 is mounted in the chamber 32 and defines an opening 41in a wall of the housing 30, said opening being disposed between thebaie plates 38 and 40. The waved openings 37 in the feeder 36 areadapted to be disposed in a manner such that the various portionsthereof will be similarly disposed. The balile vmember 39 is disposed soas to prevent travel of the coal by the feed member 36 and to insuredirection thereof into the openings 37 .y Thus it may be seen that thefeeder member 36 is disposed so as'to permit only a regulated amount ofcoal to be dis- .charged into` the portion o f the chamber 32 juxtaposedto the opening 29.

By referring to Fig. 1, it may be seen thattwo feeder members such asthe one just described are provided. These feeder members are located onopposite sides of the drive` shaft 19. The additional member comprises afeed roller 36 that is mounted on the shaft 35, these parts beingsimilar to the shaft 35 and the feeder 36.

Mounted on the shaft 35 is a sprocket 42 and mounted on the shaft 23 inalignment with the sprocket 42 is a sprocket 43 and a suitable chainbelt 44 interconnects these two sprockets. It is to be understood thatany other analogous power of transmitting mechanism might be substitutedin place of the just described chain belt drive and still not departfrom the purview of my invention.

The side walls of the housing 45 of the pulverizing mill are arranged soas to embody a portion defining the shoulder 46. This shoulder 46 inco-operation with the end wall 11 deines a chamber 47 that will be'knownhereinafter as the beater chamber. Mounted in the chamber 47 on theshaft 19 are the beattermine the completeness ofthe' i ulverization andthe magnitude of the artic es.

The end walls 45 of t e pulverizing mill.

of the housing define a reduced passage 63 between the shoulders 46 and60 and mounted adj acent the shoulder 46 so as to control passage intothe chamber 63 is an air controlling device 64'which is arranged so thatthe openings therein may be adjustably varied. The deviceI 64 iscomprised of two divisible sections which are clamped on the shaft 19 soas to be rotatable therewith. As the fan 62 rotates, the air is drawnthrough the beater chamber and ulverized coal picked up and drawn past te controlling device 64, the amount of air and fuel passin this memberbeing controlled by the size o the openings therein. The fan 62 may bearranged so as to embody any desired number of blades.

By referrlng to Fig. 1, it ma be seen that an air supplying conduit 64,w 'ch embodies branches 65 and 66 that are directed into the chambers 32and 32 of the feeder mechanism through suitable openings provided in thewalls of these chambers, is provided. The

branch 65 communicates with the chamber 32 through the opening 67 `(Fig.2).. If desired, the conduit 64 may be directed to a point at which thevair may be heated before its admission into, said conduit and while thisis preferable, it is not necessary for proper operation of my device.The rotation of the fan 62 will cause the air to be drawn from theconduit 64 through the opening 29 to the beater chamber 47 past thecontrol device 64into the chamber 63 and thence into the chamber 61which is in communication with the discharge opening 68. An auxiliaryair opening 69 is provided in the passage 63 so that additional air maybe mixed with the air and fuel passing through this passage. In the wall12 of the housing an air register 70 is mounted which has an opening 71therein and communication through these openings 71 is controlled by theshutters 72. The shutters 72 are arranged so as to be adjusted in orderthat the quantity of air adapted to pass through the register 70 may beregulated.,

The speed of operation of the fan 62 determines the speed of air passagethrough the chamber 47, and this in turn regulates the 'size of theparticles of pulverized coal that will be picked up and carried by theair.

The sprocket 43 is mounted on the clutch member 74 that is rotatablymounted on the shaft 23. Preferably the sprocket 43 is keyed to theclutch member 74 in order that said clutch member may be moved withoutaltering the position of the sprocket 43. As stated, rotation of thesprocket 43 is conveyed to the sprocket 42 through the chain'belt 44 lllor other analogous means. The clutch member 73 is securely keyed on theshaft 23. A 'aw formation comprised of the tongue memer 92 and therecess 93 is provided and this construction is such that when the clutchis engaged so as to operate the feed roller 36 in the manner described,jamming of the feed roller 36 will cause the clutch to operate and dueto the Wedge formation of the part 92 the clutch member 73 and 74 willbe cammed apart. A spring 76 is disposed around the shaft 23 between theslidable clutch member 7 4 and the member 7 5 which issecurely fixed'tothe shaft 23. This spring serves to hold the clutch in engagement.IrVhen the' clutch is cammed apart in the mannerv described theretaining member 77 slides along the outer surface of the clutch member74 and comes into the position depicted in Fig. 1 wherein it holds theclutch in disengaged position. The clutch retaining member 77 ispivotally mounted at 90 and includes a portion 91 to which the rod 78 isattached. The opposite end of the rod 7 8 is attached to the clutchactuating member 80 which is disposed on the opposite side of the deviceand which is adapted to `operate the mechanisms which will drive thefeed roller 38, these mechanisms being identical with those disclosed inconnection with the feed roller 36. As the clutch retaining member 77comes into the position described, it acts on the member 80 to causeengagement with the clutch which will drive the feed roller 36. Thus thefeed roller 36 will be brought into operation as the feed roller 36 jamsand if desired a suitable warning signal may be provided on these feedmechanisms in order that the operator of the device may be appraised ofthe fact that one of the feed mechanisms has jammed in order that he maydetermine the cause thereofl and remove it so that this feed mechanismwill be ready to function in the event the other feed mechanism jams.

When the clutch actuated by the clutch operating member 80 engages theclutch retaining member 77 will be cammed down so as to rest on theouter surface of the jslidable clutch member 74. Certain of these partsare not shown in the drawings but since they are identical with theparts shown they are indicated by primed numbers. However, when the feedroller 36 jams the clutch retaining member will move into the positionsimilar to that occupied by the clutch retaining member 77 in the samemanner as that described for the clutch retaining member 77. Since theclutch retaining member 77 is pivotally mounted at 90 and inasmuch asthe rod 78 is pivotally connected to the portion 91 of the clutchretaining memberl 77 and since the opposite end of the rod 78 isconnected to the clutch operating member 8() the clutch which operatesthe feed roller 36 will be caused to engage. It is apparent that wheneither of the clutches are thrown out of'operation the members 80 and 80are thrown into the position indicated in Fig. l and these members havenotches 82 and 82 formed therein whichl are engaged by the tips of theleaf springs 8l and` 8l which serves to hold these vclutch operatingmembers in the position indicated in Fig. l which is the operativeposition. It is this movement of the clutch operating members 8O and 80which causes the operation of the clutch retaining members 77 and 77 inthe manner described. It is apparent that if desired these clutches maybe manually manipulated through the rods7 8 and 78 so that both may bethrown out of service or both may be thrown into service at the sametime.

The foregoing mechanism provides a pulverizing mill which may be kept incontinuous operation and one in which the thorough pulverization of thecoal is obtained. The construction is such that only pulverized fuelwill be admitted from the device due to the novel manner in which thepulverized fuel is picked up.

While I have illustrated and described the preferred form ofconstruction for carrying my invention into effect, this is capable ofvariation and modification, without departing from the spirit of theinvention. I, therefore, do not wish to be limited to the precisedetails of construction set forth, but desire to avail myself of suchvariations and modifications as come within the scope of the appendedclaims.

Having thus described my invention, what I claim as new and desire toprotect by Letters Patent is:

1. In a delivery device, a pair of rotatable elements having openings ofa predetermined size formed in the periphery' thereof and adapted toextend axially thereof, means for independently directing fuel to saidrotatable elements, a drive shaft, clutch members associated with saiddrive shaft, operating means for said clutchmembers, means forconnecting said clutch operating means whereby when one of said clutchesis disengaged the other of said clutches will be engaged whereby toindependently connect said rotatable elements to said drive shaft forrotation therewith.

2. In a delivery device, a pair of housings, hoppers associated with theinlet openings of said housings, rotatable members mountedk in saidhousings below said hoppers, said rotatable members having openings of apredetermined size formed in the periphery thereof and adapted to extendlongitudinally thereof, guide plates carried by said housing adapted tobe disposed to direct material introduced through said hoppers to theopenings in said rotatable members, a drive shaft, means for includingclutches adapted to selectively connect said rotatable members to saiddrive shaft, operating means for Said clutches, means forinter-connecting said operating means, said last named means beingadapted to engage one of said clutches as the other of said clutches isdisengaged whereby 11:20 independently rotate said rotatable memers.

3. In a delivery device, a pair of housings hoppers associated with the1nlet openings o said housings,rotatable membersmounted n said housingsbelow said hoppers, said ro-v tatable members having openings of a pre?determined s ize formed in the periphery thereof and extendinglongitudinally thereof, guide plates carried by said housings disposedto direct material introduced through said hoppers to the openings insaid rotatable members, a drive shaft, an operating shaft driven by saiddrive shaft, clutch members on said operating shaft, clutch membersassociated with said rst namedv clutch members, means for connectingsaid second named clutch members and said rotatable elements, means foroperating said clutches, and means for interconnectin said clutchoperatin means whereby w en one of said secon 'i named clutches isdisengaged from one of said first named clutches the other of saidsecond named clutches will be engaged with the other of said first namedclutches.

In testimony whereof I aflix my signature.

GEORGE GALAN.

